[reds4]

I've favored Thunder headers, used one's, or drilled

 

[reds4]

What do you mean by Drilled?

Flame arrestors, mesh, anything that causes backpressure.. unlike punching the baffles. Basically pulling the guts and modifying, cut/weld, as drill holes in the cones. If that helps in explaining, as long as it doesn't sound like sht and gives it a good note as ageing them.

 

[reds4]

My Google doesn't show HD ones & don't know your resource nor skill apetude, ck to see if you
Can see thru em, if the tip comes off the better, like punching the knock outs on an electrical box, setup surface or jigg, 2x6&rags, 4' piece of 3/4" iron water pipe cut at 60 degree, get the thinkin, that's just ol school and works...today we plasma open and do as we please, strip chrome first, paint or re chrome an such